⑤ 砂轮机
Pc5=Kd5Pe5总=0.6×18=10.8kW
Qc5=Pc5﹒tan?5=10.8×0.88=9.504kvar S22c5=(Pc5?Qc5)=14.39kVA Ic5c5=
S3U=21.87A N⑥ 起重机 P?e6a=KN25??PN=
?17.525%%=17.5 P?e6b=Kd6N40%?PN=?40%%8.6=10.88 P?e6b=Kd6N40%?PN=
?4.22=5.34 40%%Pc6=Kd6Pe6总=Kd6PN=0.15×(17.5+3×10.88+2×5.34）=9.123kWQc6=Pc6﹒tan?6=9.123×1.73=15.78kvar S22c6=(Pc6?Qc6)=18.23kVA ISc6c6=
3U=27.71A N⑦ 轴流风机
Pc7=Kd7Pe7总=0.8?（10?0.8）=6.4 kW Qc7=Pc7﹒tan?3=6.4?0.75=4.8kvar S2c7=(Pc7?Q2c7)=8kVA
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Ic7=
Sc7=12.16A 3UN取同时系数为0.9，则总的计算负荷为： Pc=K?q?Pi?177ci=0.9?（27.75+31.5+31.04+7.9+10.8+9.123+6.4）=112.06kW
Qc=K?q?Qi?12ci=0.9?（36.91+6.3+23.28+10.5+9.504+15.78+4.8）=96.37kvar
Sc=(Pc?Qc)=147.80kVA
Sc3UN2Ic=
=224.62A
损耗：
△ P=0.015Sc总=0.015?147.80=2.217kW △
Q=0.06Sc总=0.06?147.80=8.868kvar 1T高压侧计算负荷：
Pc高=Pc+△P=112.06+2.217=114.277kW Qc高=Qc+△Q=96.37+8.868=105.238kvar Sc高=(Pc高?Qc高)=155.35kVA
Sc高3UN22Ic高=
=236.09A
表2-2 第五车间各用电设备组的分组及负荷计算数据
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